| Henderson, Pct. 1, Therese | Appointed by Select Board | Town Manager | | |
| Hayner, William | School Enrollment Task Force, School Committee | Town Manager | | bill_hayner@comcast.net |
| Hargrove, Molly | Master Plan Update Advisory Committee | Town Manager | | |
| Hartman, Lillian | Master Plan Update Advisory Committee | Town Manager | | |
| Hung, Mary | Council on Aging, 2024 | Boards & Commissions, Town Manager | | |
| Harmer, Darrel | Capital Planning Committee | Boards & Commissions, Town Manager | | |
| Helmuth, Eric D. | Select Board, Tree Committee | Boards & Commissions, Town Manager | | |
| Helmuth, Eric D. | Select Board, 2027 | Boards & Commissions, Town Manager | (617) 475-0962 | EHelmuth@town.arlington.ma.us |
| Hurd, John | Audit Advisory Committee, Vice Chair Select Board | Boards & Commissions, Town Manager | | |
| Homan, Elizabeth | Audit Advisory Committee, Superintendent of Schools | Boards & Commissions, Town Manager | | |
| Horowitz, Gary | Human Rights Commission, 2024 | Boards & Commissions, Town Manager | | |
| Homan, Ph.D., Elizabeth C. | Human Rights Response Coordination Team | Boards & Commissions, Town Manager | | |
| Helmuth, Eric | Information Technology Advisory Committee | Boards & Commissions, Town Manager | | |
| Heidell, Pam | Master Plan Advisory Committee | Boards & Commissions, Town Manager | | |
| Hughes, Kenneth | Post Employment Medical Benefits Committee | Boards & Commissions, Town Manager | | |
| Hughes, Kenneth | Retirement Board | Boards & Commissions, Town Manager | | |
| Horan, Richard | Utility Pole Working Group | Boards & Commissions, Town Manager | | |
| Hurd, John | Arlington Committee on Tourism & Economic Development, Select Board | Boards & Commissions, Town Manager | | |
| Homan, Elizabeth | Local Emergency Planning Committee, School Superintendent | Boards & Commissions, Town Manager | | |
| Helmuth, Eric | Local Emergency Planning Committee, Select Board | Boards & Commissions, Town Manager | | |
